{"id":"F2008L04126","name":"AD/PA-25/38 - Fuel System - CANCELLED","slug":"ad-pa-25-38-fuel-system-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":76048,"registerId":"commonwealth-F2008L04126-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-25 (Pawnee) Series Aeroplanes","sectionType":"division","heading":"Piper PA-25 (Pawnee) Series Aeroplanes","content":"### Piper PA-25 (Pawnee) Series Aeroplanes\n\n| AD/PA-25/38 | Fuel System | 12/2008 |\n| ----------- | ----------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                    |\n| ------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 20 November 2008.                                                                                                                                                                                                                                     |\n| Background:  | This unique Australian AD specified modification of all aircraft with wing fuel tanks to New Zealand Airwork modifications AW 396, 397 and 401. The AD was not based on a Piper service document. Compliance was required before December 1986. The AD is no longer required. |\n\n![](image.001.png)\n\nCharles Lenarcic  \nDelegate of the Civil Aviation Safety Authority\n\n10 October 2008","sortOrder":0},{"sectionNumber":"AD/PA-25/38","sectionType":"part","heading":"AD/PA-25/38","content":"## AD/PA-25/38","sortOrder":1},{"sectionNumber":"Fuel System","sectionType":"part","heading":"Fuel System","content":"## Fuel System","sortOrder":2},{"sectionNumber":"12/2008","sectionType":"part","heading":"12/2008","content":"## 12/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2464},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"The original Airworthiness Directive imposed mandatory fuel tank modifications on affected aircraft. This cancellation instrument completely eliminates those requirements, representing a shift from active safety regulation to deregulation for this specific issue. The effective scope of legal obligations on aircraft owners has been reduced to zero compared to the original safety mandate."},"complexity_factors":["Single operative provision (cancellation of previous directive)","No defined terms or interpretation section","No conditional logic, exceptions, or cross-references","Document consists primarily of background explanation rather than substantive requirements"],"plain_english_summary":"**What this does:** This document officially cancels a previous aircraft safety rule (Airworthiness Directive) that applied to Piper PA-25 Pawnee aeroplanes.\n\n**Who it affects:** Owners and operators of Piper PA-25 Pawnee series aircraft (commonly used for agricultural spraying and banner towing).\n\n**What it changes:** Previously, owners had to modify their aircraft's wing fuel tanks to meet specific New Zealand Airwork standards by December 1986. As of 20 November 2008, **this requirement no longer applies** and owners no longer need to comply with those modifications.\n\n**Why it matters:** This removes an outdated regulatory burden. The Civil Aviation Safety Authority (CASA) has determined the safety modifications are no longer necessary, simplifying maintenance requirements for these older agricultural aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-25-38-fuel-system-cancelled","history":"/api/acts/ad-pa-25-38-fuel-system-cancelled/history","analysis":"/api/acts/ad-pa-25-38-fuel-system-cancelled/analysis","conflicts":"/api/acts/ad-pa-25-38-fuel-system-cancelled/conflicts","importantCases":"/api/acts/ad-pa-25-38-fuel-system-cancelled/important-cases","documents":"/api/acts/ad-pa-25-38-fuel-system-cancelled/documents"}}